/* Looking for the SingleLiveEvent class? We are now using the Event class. Read more:
https://medium.com/androiddevelopers/livedata-with-snackbar-navigation-and-other-events-the-singleliveevent-case-ac2622673150
 */

///*
// *  Copyright 2017 Google Inc.
// *
// *  Licensed under the Apache License, Version 2.0 (the "License");
// *  you may not use this file except in compliance with the License.
// *  You may obtain a copy of the License at
// *
// *      http://www.apache.org/licenses/LICENSE-2.0
// *
// *  Unless required by applicable law or agreed to in writing, software
// *  distributed under the License is distributed on an "AS IS" BASIS,
// *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// *  See the License for the specific language governing permissions and
// *  limitations under the License.
// */
//
//package com.example.todoapplive;
//
//import android.util.Log;
//
//import java.util.concurrent.atomic.AtomicBoolean;
//
//import androidx.annotation.MainThread;

//import androidx.annotation.Nullable;
//import androidx.lifecycle.LifecycleOwner;
//import androidx.lifecycle.MutableLiveData;
//import androidx.lifecycle.Observer;
//
///**
// * A lifecycle-aware observable that sends only new updates after subscription, used for events like
// * navigation and Snackbar messages.
// * <p>
// * This avoids a common problem with events: on configuration change (like rotation) an update
// * can be emitted if the observer is active. This LiveData only calls the observable if there's an
// * explicit call to setValue() or call().
// * <p>
// * Note that only one observer is going to be notified of changes. Read
// * https://medium.com/androiddevelopers/livedata-with-snackbar-navigation-and-other-events-the-singleliveevent-case-ac2622673150
// * for more information.
// */
//public class SingleLiveEvent<T> extends MutableLiveData<T> {
//
//    private static final String TAG = "SingleLiveEvent";
//
//    private final AtomicBoolean mPending = new AtomicBoolean(false);
//
//    @MainThread
//    public void observe(LifecycleOwner owner, final Observer<? super T> observer) {
//
//        if (hasActiveObservers()) {
//            Log.w(TAG, "Multiple observers registered but only one will be notified of changes.");
//        }
//
//        // Observe the internal MutableLiveData
//        super.observe(owner, new Observer<T>() {
//            @Override
//            public void onChanged(@Nullable T t) {
//                if (mPending.compareAndSet(true, false)) {
//                    observer.onChanged(t);
//                }
//            }
//        });
//    }
//
//    @MainThread
//    public void setValue(@Nullable T t) {
//        mPending.set(true);
//        super.setValue(t);
//    }
//
//    /**
//     * Used for cases where T is Void, to make calls cleaner.
//     */
//    @MainThread
//    public void call() {
//        setValue(null);
//    }
//}
